Several of the group's imams said they would not be comfortable presiding over a funeral for the elder brother, so the organization would likely ask a lay person to officiate, she said.

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Abdul Quddoos, the elder brother of Shazad Ali and Abdul Musavir, said he was "distraught" at the loss of his brothers.

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Intelligence officials said the two men came to the U.S. at different times with the elder brother arriving on his own in 2004.

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The moment his elder brother was shoved into the SUV, the younger Mr. Gupta received a phone call from a witness, he said in an interview.

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